Database
ZF (ZERMELO-FRAENKEL) SET THEORY
ZF Set Theory - add the Axiom of Union
The mapping operation
fpmg
Next ⟩
pmss12g
Metamath Proof Explorer
Ascii
Unicode
Theorem
fpmg
Description:
A total function is a partial function.
(Contributed by
Mario Carneiro
, 31-Dec-2013)
Ref
Expression
Assertion
fpmg
⊢
A
∈
V
∧
B
∈
W
∧
F
:
A
⟶
B
→
F
∈
B
↑
𝑝𝑚
A
Proof
Step
Hyp
Ref
Expression
1
ssid
⊢
A
⊆
A
2
elpm2r
⊢
B
∈
W
∧
A
∈
V
∧
F
:
A
⟶
B
∧
A
⊆
A
→
F
∈
B
↑
𝑝𝑚
A
3
1
2
mpanr2
⊢
B
∈
W
∧
A
∈
V
∧
F
:
A
⟶
B
→
F
∈
B
↑
𝑝𝑚
A
4
3
3impa
⊢
B
∈
W
∧
A
∈
V
∧
F
:
A
⟶
B
→
F
∈
B
↑
𝑝𝑚
A
5
4
3com12
⊢
A
∈
V
∧
B
∈
W
∧
F
:
A
⟶
B
→
F
∈
B
↑
𝑝𝑚
A